Means for testing stay bolts for boilers



MEANS FOR TESTING STAY BOLTS FOR BOILERS.

APPLICATION FILED FEB 8, 19m.

1,414,07 5. V Patented Apr. 25, 1922 E; E I w- WINESSLS NVENTOR I I P $4 M I lformys m ner: r. Donne, or PITTSBURGH, PENNSYLVANIA,CASSIGiNOR T0 rLennEnY mLrrrsn rare-steamer FFEQE o COIVIPILNY, OF PITTSBURGH; BENNSYLVANIA. j

Means non Tnsrmo sray nonrs non BOILERSQ To r/ZZ whom it may concer /ti Be it known that I, ETHAIJ I. Donne; a citizen of the United States, and a resident of Pittsburgh, in the county of Aiiegheny and State of Pennsylvanian have invented certain new and useful Improvements in Means for Testing Stay Bolts for Boilers;

and I do hereby declare theffOliOWingtO' be plied to the teil-tale bore of a bolt, to determini'n by the applicationoi pressure withinthe not, whether the latter is ruptured iVith tht and other objects in View, the ".nention consists uction a hereinai'.tcr the claims. I V y in the accompanying drawings, Figurel is a sectional view showing an embodiment L; combinations of parts torth and pointed out vin my invention. and Figure 2 is a diagrammatic-a view.

1 represents the head or body portion of the derive and is made with a. chamber 2. he end oi this chanil'iered head is recessed and at .ptod for the reception of an externaily threaa'led ring 3 which cooperates with the shoulder termed by the recessing of the head. to clamp the peripheral portion of a flexible diaphragm A nozzle 6 passes through the center or" the diaphragm 5 and is secured thereto, said nozzle extending through the chamber 2 and projecting forwardly beyond the same. A spider 7' proiects forwardly from the ring and is-inade graily with a h b S which forms a bearin for the fort 1rd port on 0t thenozzle.

Thenozzle 6 is made somewhat conical at its forward end and provided with a collar 9 or rubber or other packing material where-v by a tight fit may be effected between said nozzle and the'wall of the inner end of the tell-tale bore 10 of a stay bolt 11.

The inner end of the nozzle 6 communicates with a duct 12 in the handle portion 13 Application filed February 8 1 918."' Seria1"No;

in certain novel features Specification of ietters I'atent. Pgrt ntgdiApr, 25,

of the device" and the -rear end of the latter is adapted for the reception of 'a-suitable pipe connection 14: with a tank l l yorother j sourceotfluid pressure supply, a suitable valve being provided for controlling-passage ofthefluid througlr th'e-dnct 12." Ports 15 are provided whereby-fluid under pressure may pass from the duct 12 to the chamber? in thehead 1. 7 I The head orbody portion- 1 is .provided w'itha duct 16 communicating at one' 'end with, the duct'12and having its wall at its open end --threaded for the reception of a connection 1;? leading-t0 a pressure gage 18. infusing the device-to test the integrity :of

a staybolt; the nozzle is applied to the open end of the telbtale' bore of; the bolt and the j rah e controlling the supply of fluid pres sure (either air or "liouidi-will then be opened. A" portionof the fluid flowing through the duct-'12 will enterthe chamber 2 through the ports 15.; i The pressure within the'chamber wiiiilitend to cause relative movement'of-the-nozzleti'and theibody or" V the device; The operator will esistabackw: .rd pressureezgerted"in'thechamber 2 and hence the tiuid pressure'in the --chamber 2 will tend force thejdiaphragmBand nozzle 6- forwardly and cause a tight connection of the-forward end ofthenozzle with-the 'stayholt to be maintained during the opera tion 01 the devices The fluid under pressure will also pass through the nozzle 6 andienter the tell-tale bore of thebolt-and the said fluidv pressure w l also reach the gagelS through the duct 16. r

The'fiuid will be introduced with a predetermined pressure and it such predeternined degreebe indicated on the gage; this vfact wiil indicate that the bolt 15 whole.

Shouid the bolt be rupturedsothat the fluid intreihu-ed into the tell-tale bore would leak 'ough a crack or fracture, the gage would ermined pressure andthe fact of reduced pressure as indicated by the gage would de iote the fractured condition of the bolt. It will be apparent also, that the extent of the tractl'ire of the boltwill be approximately equal to thelfall below the predetermined pressure, as indicated by the gage, and thus the devicewili denote, not only the presence of a fracture o'fthe bolt, but" also the approximate magnitude of such fracture. I Having fully ,descrlbed my invention what a degree of pressure less than-the preioof i '3 new I claim as new and desire to secure by Lettens-Patent, is zi r 1. A device for testing boiler staybolts having tell-tale bores, comprising a member having a duct, a nozzle slidingly mounted in said member and adapted to communicate withsaid duct, means whereby fluid pressure may be applied to the s lidable nozzleto press the same against a staybolt at the open end of the tell -tale bore thereot, anda pressure gage also communicating with said duct. Q A deVice for testing boiler staybolts havingtell-tale bores, comprising a portable member, a movable nozzle carried by said member, said nozzle having a free end to engage a, staybolt at the openend of the tell-tale bore thereof, ,means for applying fluid pressure to the movable nozzle to press tliersanie against the staybolt, said member provided ,vvith means whereby fluid under pressure may pass through said nozzle and into the tell-tale bore of the bolt, and a pressure gage for denoting such pressure. 3. i device for testing boiler staybolts having tell-tale bores, comprising a head 'having a chamber, a nozzle movably connected with said head and having a free end adapted to engage a stay bolt at the open end o'f the bore, means whereby fluid under pressure may pass through said nozzle and enter the tell-tale bore of the bolt, means wherebypressure will tend to pressthe nozzle toward the staybolt and maintain a tight fit betweensaid nozzle and the staybolt, and

.a pressure gage for denotingthe degree of pressure in the tell-tale bore of the bolt.

1 4. :A staybolt testing device, comprising a chambered head, a diaphragm closing the chamber of said head, a nozzle secured to said diaphragm, said nozzle having a part in the chamber of the head and a part pro jecting beyond the diaphragm and adapted for application to the tell-tale bore of a stay bolt, means for conveying fluid under pres sure to the chamber in the head and to said nozzle, and a pressure gage {or denoting the degree of pressure sustained by the stay bolt. 5. A staybolt testing device, comprising a chambered head and a handle portion having a duct communicati' g with the chamber in the head, a diaphragm closing said chamber, a nozzle secured to and passing through said diaphragm, said nozzle having a part to communicate with the duct in the handle portion, and also havinga part projecting beyond the diaphragm for application to the tell-tale bore of a stay bolt, and a pressure communicating with said duct. 6. Astay bolt testing device, comprising a chambered head and a handle portion having a duct communicating with the chamber in said head, a ring threaded into one end oi the chambered head, a diaphragm held in place by said ring, a spider on said ring having a,hub,vav nozzle passing through and secured to said diaphragm and" adapted for applicationto the tell-tale bore of a stay bolt, said nozzle passing through the hub oi: said spider, and a pressure gage communieating with the duct in the handle portion.

In testimony whereof, i have signed this specification in the presence of two subscrily iiig witnesses.

I, ETHAN I. DODDS. Witnesses I F. H, ALLIsoN,

JOHN M. RoNEY. 

